Linear polarization method for corrosion monitoring probe corrosion situation changes fast response instantaneous corrosion rate can be achieved

Pipe, equipment corrosion monitoring is that there is a close relationship between corrosion rate and some corrosion state of continuous or intermittent measuring parameters, and at the same time, according to the result of measurement to adjust and control conditions related to the process of production of a technology. In the process of natural gas development, excessive corrosion often caused production shutdown, equipment efficiency decline, environmental pollution, and even endanger the safety of life such as fire, explosion accident, therefore how to prevent corrosion accidents, effective guidance anticorrosive measures is the main purpose of corrosion monitoring. Corrosion monitoring in the process of development is seen as excessive corrosion accidents, effective corrosion prevention as a first step, also is one of the most important step, to ensure the safety of construction and production has important significance, in natural gas plays an important role in the development process.

Corrosion monitoring probe of corrosion situation changes fast response and linear polarization method can get the instantaneous corrosion rate, more sensitive, can reflect the change of equipment operation condition in a timely manner, is a kind of very suitable for monitoring method. But it is not suitable for application in poor conductivity of medium, this is because when the device surface with a layer of dense oxide film or passivation membrane, accumulation of corrosion products, even will result in false capacitance and cause a great error, even you can't measure. In addition, the corrosion rate are obtained by linear polarization method, technical foundation is based on the steady state condition, the measured object is uniform corrosion or corrosion in an all-round way, thus linear technology can't provide the information of local corrosion. Under the condition of some special detection of metal corrosion rate usually need to be compared with other test methods to ensure the accuracy of the linear polarization detection technology. Linear polarization resistance method can online real-time monitoring of the corrosion rate.